Finance minister Nirmala Sitharaman on Tuesday asked the Income-Tax department to quickly process tax returns, issue refunds and redress grievances.Sitharaman said pending cases need to be resolved expeditiously and that the department could run a campaign for this on the lines of public sector banks Despite Covid-19 related challenges,she said direct tax collections had sustained the momentum and use of technology had closed the gap between direct tax and indirect tax collections. She outlined three 'R's that the department should follow -- quicker processing of returns, speedier refunds and redressal of grievances. "What is well within you and never going to change and never needs anything more are these three 'R's," Sitharaman said at an event of the CBDT.